JVET-C0026 Tiles coding improvement for Inter pictures by improved merge list at tile boundaries [S. B. Raut (Samsung)]

This contribution presents a method to change the merge list at tile boundaries when encoding inter picture with multiple tiles. The proposed method derives new temporal candidates from reference pictures for each unavailable spatial merge candidate at tile boundaries. The new proposed candidates are appended at the end after the normally available candidates in the merge list. This proposed method is asserted to help the merge list by making up for the unavailable spatial candidates at tile boundaries with new temporal candidates. BD-rate improvements of 0.02% and 0.04% were reported for LDB and LDP configurations, respectively, with the proposed method, when picture is encoded with JEM2.0 using four tiles. It was asserted that the BD-rate improvement will further increase with the increase in the number of tiles used to encode the picture.

This seemed not relevant in the current exploration, as only a single tile is used in the CTC. No need for action was identified.